package com.cwj;

/**
 * @author: Chenwujie
 * @date: 2021-03-30 17:02
 */
public class DoubleCheckTest {
    private static class InstanceHolder{
        public static Instance instance = new Instance();
    }
    public static Instance getInstance(){
        return InstanceHolder.instance;
    }

    private static class Instance{

    }
}
